Euphorbia trigonalove bright sunlight. A south-facing window is an ideal location to place it, though an east- or west-facing window will also work.
Sun:They require at least four hours of bright, indirect sunlight per day. Can also thrive in partial shade.
Temperature:This plant will suffer in temperatures below 55°F. If outside, bring your plants outdoors from spring to late autumn.
Pot and Soil:Being a succulent (not a cactus!), this plant requires well-draining soil in a pot that drains easily, as well. The pH of the soil should be from 6.1 (mildly acidic) to 7.8 (mildly alkaline). I use Miracle Grow potting soil for mine and it does just wonderfully.
Water:Euphorbia trigonalike to dry out between waterings. Dip your finger about an inch into the soil: if it's damp, you can wait on watering; if it's dry, you know it's time to water again.
Flowers:It's less likely for an indoor plant to bloom but, with ideal conditions, look for white or yellow flowers during spring or summer.
Repotting:It will need to be repotted every two to three years or so.
Pruning:If your plant gets too heavy, consider pruning off the arms (and propagating those clippings to make new plants).